PhpMyAdmin\SqlParser\Statements\InsertStatement::parse()

Complexity

Conditions	25
Paths	10

Size

Total Lines

128

Duplication

Lines	31
Ratio	24.22 %

Code Coverage

Tests	63
CRAP Score	25.0182

Importance

Changes

0

<?php
    public function parse(Parser $parser, TokensList $list)
    {
        ++$list->idx; // Skipping `INSERT`.

        // parse any options if provided
        $this->options = OptionsArray::parse(
            $parser,
            $list,
            static::$OPTIONS
        );
        ++$list->idx;

        /**
         * The state of the parser.
         *
         * Below are the states of the parser.
         *
         *      0 ---------------------------------[ INTO ]----------------------------------> 1
         *
         *      1 -------------------------[ VALUES/VALUE/SET/SELECT ]-----------------------> 2
         *
         *      2 -------------------------[ ON DUPLICATE KEY UPDATE ]-----------------------> 3
         *
         * @var int
         */
        $state = 0;

        /**
         * For keeping track of semi-states on encountering
         * ON DUPLICATE KEY UPDATE ...
         */
        $miniState = 0;

        for (; $list->idx < $list->count; ++$list->idx) {
            /**
             * Token parsed at this moment.
             *
             * @var Token
             */
            $token = $list->tokens[$list->idx];

            // End of statement.
            if ($token->type === Token::TYPE_DELIMITER) {
                break;
            }

            // Skipping whitespaces and comments.
            if (($token->type === Token::TYPE_WHITESPACE) || ($token->type === Token::TYPE_COMMENT)) {
                continue;
            }

            if ($state === 0) {
                if ($token->type === Token::TYPE_KEYWORD
                    && $token->keyword !== 'INTO'
                ) {
                    $parser->error('Unexpected keyword.', $token);
                    break;
                }

                ++$list->idx;
                $this->into = IntoKeyword::parse(
                    $parser,
                    $list,
                    array('fromInsert' => true)
                );

                $state = 1;
            } elseif ($state === 1) {
                if ($token->type === Token::TYPE_KEYWORD) {
                    if ($token->keyword === 'VALUE'
                        || $token->keyword === 'VALUES'
                    ) {
                        ++$list->idx; // skip VALUES

                        $this->values = Array2d::parse($parser, $list);
                    } elseif ($token->keyword === 'SET') {
                        ++$list->idx; // skip SET

                        $this->set = SetOperation::parse($parser, $list);
                    } elseif ($token->keyword === 'SELECT') {
                        $this->select = new SelectStatement($parser, $list);
                    } else {
                        $parser->error(
                            'Unexpected keyword.',
                            $token
                        );
                        break;
                    }
                    $state = 2;
                    $miniState = 1;
                } else {
                    $parser->error(
                        'Unexpected token.',
                        $token
                    );
                    break;
                }
            } elseif ($state === 2) {
                $lastCount = $miniState;

                if ($miniState === 1 && $token->keyword === 'ON') {
                    ++$miniState;
                } elseif ($miniState === 2 && $token->keyword === 'DUPLICATE') {
                    ++$miniState;
                } elseif ($miniState === 3 && $token->keyword === 'KEY') {
                    ++$miniState;
                } elseif ($miniState === 4 && $token->keyword === 'UPDATE') {
                    ++$miniState;
                }

                if ($lastCount === $miniState) {
                    $parser->error(
                        'Unexpected token.',
                        $token
                    );
                    break;
                }

                if ($miniState === 5) {
                    ++$list->idx;
                    $this->onDuplicateSet = SetOperation::parse($parser, $list);
                    $state = 3;
                }
            }
        }

        --$list->idx;
    }
}